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Faenza composting plant

Via Convertite 6, Faenza (RA)

  • 1 / 1   Faenza composting plant


Founded in 1995, this plant treats mainly vegetable waste, manure, biological sludges of agro-industrial origin, and the lignocellulose fraction deriving from the maintenance of public and private gardens and parks.

The plant is located at Via Convertite 6, Faenza (RA) and is authorised to treat waste by accelerated bio-oxidation in fermentation trenches for the production of high-quality composted mixed soil improver.

Page updated 26 August 2015

    Treatment capacity
    30,000 tonnes of organic and lignocellulose waste for the production of high-quality composted mixed soil improver
    Types of waste accepted
    Market waste, vegetable waste, biological sludges from agro-industry, manure, lignocellulose waste deriving from the maintenance of public and private gardens and parks

    The production process of the plant consists of the following stages:

    • delivery of the waste;
    • mixing, in a mixer truck, of the various waste types according to their humidity and nutrient content in order to obtain the right fermentation substrate;
    • filling of the fermentation trenches/tunnels;
    • mechanical turning and oxygenation of the piles;
    • forced aeration of the trenches;
    • curing under cover;
    • refinement with a vibrating screen;
    • the non-reusable fraction left over after refinement is sent for energy recovery in thermal power stations.

    All vehicles entering the site must first pass through the weighing station, where the incoming flows are recorded and the deliverer´s authorisation to enter the site is checked, along with the relevant transport documents and permits.
    The waste is then unloaded in the designated storage areas and, before treatment, is divided into categories.

    The lignocellulose fraction deriving from the maintenance of public gardens and parks is delivered already ground. According to the chemical and physical characteristics, the matrices are loaded into the mixer truck using a wheel loader with a built-in weighing machine. They are then transferred into the fermentation trenches by a series of conveyor belts.

    The plant consists of nine dynamic trenches, in which an active microbiological process is triggered that brings the entire mass to temperatures above 55°C for at least three days.
    The mixture remains here for at least 14 days, during which time the decomposition processes take place. Thanks to periodic turning and the blowing of forced air through the mixture, the anaerobic conditions that would otherwise produce foul-smelling compounds are greatly limited. An aspiration system inside the fermentation shed channels the exhausted air to the biofilter for purification.

    After regular turnings, the product reaches the tail-end of the plant, where it is extracted using a wheel loader and placed under cover for the maturation (curing) phase. After around 90 days, the compost produced is screened using a vibrating screen with a 6 mm square mesh.

    The refinement stage produces two fractions: a finished product with a diameter of 0-6 mm, and a non-reusable fraction with a diameter of > 6 mm, which is sent for energy recovery in a thermal power station.

    Before being marketed, the conformity of the product is checked by means of special laboratory analyses. The composted mixed soil improver meets the specifications set out for high-quality compost by the Italian Association of Compost Producers (CIC) in March 2004.


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